you know, the whole notion of bill clinton saying never inhaled. when jay leno asked him about it. without going overboard, may book documents it pretty thoroughly. that's what they did. he has a thing called ta, total absorption which meant not only did you inhale, but everything in the car when you're smoking it. and so that was part of his existence during that period. postcode david maraniss, winded dairy become barack? >> guest: it was very gradual. it started with the college in los angeles he attended for his freshman and sophomore years and there are few people dare, an african student at one of the african-americans and some others who started calling him barack when they found out that was his name and like so many college students, they start to really go back and find their identity and college and that is what he was searching for it. but many of the occidental classmates called him very. even when he got to new york, columbia, there were people who called in dairy and some barack. >> host: why did he choose accidental artist who the am i transferred to columbia? >> gu